Hidayah H. Implementation of Class management Improving the Learning Process in Class VI Umar Bin Khattab SDIT Ummi Aida Medan, Medan Tembung District. CE [Internet]. 2020Dec.11 [cited 2024Nov.24];1(1):24-35. Available from: https://pusdikra-publishing.com/index.php/josr/article/view/3